Display panel and display device

ABSTRACT

A display panel and a display device are provided. The display panel includes a substrate; a plurality of sub-pixels, each of which includes a light-emitting elements; a thin-film encapsulation layer located at a side of the light-emitting element facing away from the substrate and including a plurality of inorganic encapsulation layers and a plurality of organic encapsulation layers that are alternately stacked, at least one of the plurality of organic encapsulation layers being an organic color conversion layer configured to convert a color of light emitted by the light-emitting element; and a color filter layer located at a side of the thin film encapsulation layer facing away from the substrate.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims the benefit of priority to Chinese PatentApplication No. 202010003719.6, filed on Jan. 3, 2020, the content ofwhich is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to the field of display technologies, andin particular, to a display panel and a display device.

BACKGROUND

The colorization can be performed by a variety of ways, among whichcolor conversion is one of the most widely used ones. For example, bycombining a light source and a color conversion layer, the colorconversion layer can convert light having a color emitted by the lightsource into white light; or by combining a light source, a colorconversion layer and a color filter layer, the color conversion layercan convert light having a color emitted by the light source into whitelight, and then the color filter layer can convert the white light intocolorama.

In the related art, color conversion technology is mainly applied in abacklight module of a liquid crystal display device and rarely appliedin an organic light-emitting diode display panel (OLED display panel).Since the OLED display panel includes a relatively large number oflayers, if it is applied to the OLED display panel, the display panelwill be relatively thick, which easily results in a color cast.

SUMMARY

In an aspect, an embodiment of the present disclosure provides a displaypanel. The display panel includes a substrate; a plurality ofsub-pixels, each of which includes a light-emitting elements; a thinfilm encapsulation layer located at a side of the light-emitting elementfacing away from the substrate and including a plurality of inorganicencapsulation layers and a plurality of organic encapsulation layersthat are alternately stacked, at least one of the plurality of organicencapsulation layers being an organic color conversion layer configuredto convert a color of light emitted by the light-emitting element; and acolor filter layer located at a side of the thin film encapsulationlayer facing away from the substrate.

In an aspect, an embodiment of the present disclosure provides a displaydevice including the display panel described above.

BRIEF DESCRIPTION OF DRAWINGS

In order to more clearly illustrate technical solutions in embodimentsof the present disclosure, the accompanying drawings used in theembodiments are briefly introduced as follows. The drawings described asfollows are merely part of the embodiments of the present disclosure.Based on these drawings, other drawings can also be acquired by thoseskilled in the art.

FIG. 1 is a top view of a display panel according to an embodiment ofthe present disclosure;

FIG. 2 is a cross-sectional view along A1-A2 of FIG. 1 ;

FIG. 3 is another cross-sectional view along A1-A2 shown in FIG. 1 ;

FIG. 4 is another cross-sectional view along A1-A2 shown in FIG. 1 ;

FIG. 5 is a schematic diagram of a red conversion layer and a greenconversion layer according to an embodiment of the present disclosure;

FIG. 6 is another schematic diagram of a red conversion layer and agreen conversion layer according to an embodiment of the presentdisclosure;

FIG. 7 is still another schematic diagram of a red conversion layer anda green conversion layer according to an embodiment of the presentdisclosure;

FIG. 8 is a schematic diagram of an organic color conversion layeraccording to an embodiment of the present disclosure;

FIG. 9 is another schematic diagram of a display panel according to anembodiment of the present disclosure;

FIG. 10 is a schematic diagram of a concave reflective layer accordingto an embodiment of the present disclosure;

FIG. 11 is a schematic diagram of a light shielding layer according toan embodiment of the present disclosure; and

FIG. 12 is a schematic diagram of a display device according to anembodiment of the present disclosure.

DESCRIPTION OF EMBODIMENTS

In order to better understand technical solutions of the presentdisclosure, the embodiments of the present disclosure are described indetail with reference to the drawings.

It should be clear that the described embodiments are merely part of theembodiments of the present disclosure rather than all of theembodiments. Based on these embodiments, other embodiments obtained bythose skilled in the art shall fall into the protection scope of thepresent disclosure.

The terms used in the embodiments of the present disclosure are merelyfor describing embodiments, but not intended to limit the presentdisclosure. Unless otherwise noted in the context, the expressions “a”,“an”, “the” and “said” in a singular form used in the embodiments andappended claims of the present disclosure are also intended to representplural form expressions thereof.

It should be understood that the term “and/or” used herein is merely anassociation relationship describing associated objects, indicating thatthere may be three relationships, for example, A and/or B may indicatethat three cases, i.e., A alone, A and B, B alone. In addition, thecharacter “/” herein generally indicates that the related objects beforeand after the character form an “or” relationship.

The sub-pixel and light-emitting element can be described using theterms of “first”, “second”, “third”, etc., in the embodiments of thepresent disclosure, the sub-pixel and light-emitting element will not belimited to these terms. These terms are merely used to distinguishsub-pixels from one another and distinguish light-emitting elements fromone another. For example, without departing from the scope of theembodiments of the present disclosure, a first sub-pixel can also bereferred to as a second sub-pixel, similarly, a second sub-pixel canalso be referred to as a first sub-pixel.

An embodiment of the present disclosure provides a display panel. FIG. 1is a top view of a display panel according to an embodiment of thepresent disclosure, and FIG. 2 is a cross-sectional view along A1-A2shown in FIG. 1 . As shown in FIG. 1 and FIG. 2 , the display panelincludes a substrate 1, multiple sub-pixels 2, a thin film encapsulationlayer 4, and a color filter layer 8. Each sub-pixel includes alight-emitting element 3. The thin film encapsulation layer 4 is locatedat a side of the light-emitting element 3 facing away from the substrate1 and includes multiple inorganic encapsulation layers 5 and multipleorganic encapsulation layers 6 that are alternately stacked. At leastone organic encapsulation layer 6 is an organic color conversion layer 7that is configured to convert a color of light emitted by thelight-emitting element 3. The color filter layer 8 is located at a sideof the thin film encapsulation layer 4 facing away from the substrate 1and includes multiple color resists that are configured to filter lightin a certain wave band such that only light in a specific wave band canbe emitted out.

Since an inorganic material has good compactness and water resistance,the thin film encapsulation layer 4 mainly utilizes the inorganicencapsulation layer 5 to isolate water and oxygen, so that externalwater and oxygen can be prevented from invading the display panel toavoid erosion of the light-emitting elements 3. However, the organiccolor conversion layer 7 is configured to improve flexibility, so thatwhen a crack is generated in the inorganic encapsulation layer 5 due toexternal forces and other factors, the organic color conversion layer 7can prevent the crack from spreading, thereby improving encapsulationreliability of the thin film encapsulation layer 4.

With the display panel provided by the embodiment of the presentdisclosure, colorful display can be realized by using the colorconversion technology. For example, during displaying an image, thelight-emitting element 3 emits blue light, and when the blue light istransmitted to the thin film encapsulation layer 4, a color conversionis performed on the blue light by the organic color conversion layer 7arranged in the thin film encapsulation layer 4, so that light emittedfrom the thin film encapsulation layer 4 is converted into white light.Then, the white light is continuously transmitted to the color filterlayer 8, and the white light is filtered by the color resist arranged inthe color filter layer 8, so that light finally emitted via some colorresists is red light, light emitted via some color resists is greenlight, and light emitted via some color resists is blue light. In thisway, a colorful image can be displayed.

With the display panel provided by the embodiment of the presentdisclosure, at least one organic encapsulation layer 6 arranged in thethin film encapsulation layer 4 is reused as the organic colorconversion layer 7, so as to arrange the organic color conversion layer7 in the thin film encapsulation layer 4. In this case, the organiccolor conversion layer 7 and the organic encapsulation layer 6 that isreused as the organic color conversion layer 7 only occupy one layerspace. Since the organic color conversion layer 7 has a function ofconverting color, there is no need to provide an additional layer forcolor conversion, thereby reducing an overall thickness of the displaypanel and thus being more conducive to achieving a thinning andlightening design of the display panel. Moreover, a distance between thecolor filter layer 8 and the light-emitting element 3 is also reducedaccordingly, and thus a transmission distance of oblique light emittedfrom the light-emitting element 3 to the color filter layer 8 is reducedaccordingly, thereby reducing a probability that the oblique light istransmitted to the color resist corresponding to an adjacentlight-emitting element 3 (hereinafter referred to as an adjacent colorresist). In this way, the color cast is ameliorated.

In addition, the reduction of the overall thickness of the display paneland the reduction of the distance between the color filter layer 8 andthe light-emitting element 3 are realized by reusing the organicencapsulation layer 6 as the organic color conversion layer 7, whichdoes not affect structures of other layers arranged in the displaypanel, makes a manufacturing process relatively simple, and has arelatively high implementability.

In an example, the light-emitting elements 3 in sub-pixels 2 are bluelight light-emitting elements, that is, each light-emitting element 3emits blue light. When the organic color conversion layer 7 convertslight emitted by multiple light-emitting elements 3 into light having asame color and the light-emitting elements 3 arranged in sub-pixels 2are configured as light-emitting elements that emit light having a samecolor, only one kind of organic color conversion material can be used toform the organic color conversion layer 7. In this case, processcomplexity is reduced.

In an example, with further reference to FIG. 2 , the organic colorconversion layer 7 is configured to convert blue light into light havinga first color, and the first color is a complementary color to the bluelight, such as a yellow color. The color filter layer 8 can include ared color resist 9, a green color resist 10 and a blue color resist 11.

In combination with FIG. 1 and FIG. 2 , in an embodiment, the sub-pixels2 includes a first sub-pixel 12, a second sub-pixel 13, and a thirdsub-pixel 14, the first sub-pixel 12 includes a first light-emittingelement 15, the second sub-pixel 13 includes a second light-emittingelement 16, and the third sub-pixel 14 includes a third light-emittingelement 17. For the first sub-pixel 12, blue light emitted by the firstlight-emitting element 15 is transmitted to the organic color conversionlayer 7, then a color conversion material of the organic colorconversion layer 7 is excited by the blue light and then emits lighthaving the first color, and then the light having the first color ismixed with a background blue light to form white light. When the whitelight is transmitted to the red color resist 9 corresponding to thefirst sub-pixel 12, the red color resist 9 allows light in a red waveband of the white light to be emitted out, while filtering out light inother wave band, so that light finally emitted via the red color resist9 is red light. For the second sub-pixel 13, blue light emitted by thesecond light-emitting element 16 is transmitted to the organic colorconversion layer 7, then the color conversion material of the organiccolor conversion layer 7 is excited by the blue light and then emitslight having the first color, and then the light having the first coloris mixed with the background blue light to form white light. When thewhite light is transmitted to the green color resist 10 corresponding tothe second sub-pixel 13, the green color resist 10 allows light in agreen wave band of the white light to be emitted out, while filteringout light in other wave band, so that light finally emitted via thegreen color resist 10 is green light. For the third sub-pixel 14, bluelight emitted by the third light-emitting element 17 is transmitted tothe organic color conversion layer 7, then the color conversion materialof the organic color conversion layer 7 is excited by the blue light andthen emits light having the first color, and then the light having thefirst color is mixed with the background blue light to form white light.When the white light is transmitted to the blue color resist 11corresponding to the third sub-pixel 14, the blue color resist 11 allowslight in a green wave band of the white light to be emitted out, whilefiltering out light in other wave band, so that light finally emittedvia the blue color resist 11 is blue light.

With the above configuration, the light emitted via the organic colorconversion layer 7 undergoes a conversion from the blue light into whitelight, and then the color resists of different colors arranged in thecolor filter layer 8 convert white light into the red light, the greenlight, and the blue light, thereby achieving a colorful display of thedisplay panel.

FIG. 3 is another cross-sectional view along A1-A2 shown in FIG. 1 . Inan embodiment, as shown in FIG. 3 , the organic color conversion layer 7includes a complementary color conversion layer 18 and a first organiclayer 19. The complementary color conversion layer 18 is configured toconvert blue light into light having the first color, and the firstcolor is a complementary color to the blue light, such as a yellowcolor. The color filter layer 8 includes a red color resist 9, a greencolor resist 10, and a white color resist 20. In a directionperpendicular to a plane of the substrate 1, the red color resist 9 andthe green color resist 10 each overlap the complementary colorconversion layer 18, and the white color resist 20 overlaps the firstorganic layer 19.

The first organic layer 19 is made of an organic material, and the firstorganic layer 19 is only used to improve flexibility and does not have afunction of converting color. The white color resist 20 does not filterlight, and thus light can still retain its original color when the lightis emitted via the white color resist 20.

In an embodiment, combining FIG. 1 and FIG. 3 , the sub-pixels 2includes a first sub-pixel 12, a second sub-pixel 13, and a thirdsub-pixel 14, the first sub-pixel 12 includes a first light-emittingelement 15, the second sub-pixel 13 includes a second light-emittingelement 16, and the third sub-pixel 14 includes a third light-emittingelement 17. For the first sub-pixel 12, blue light emitted by the firstlight-emitting element 15 is transmitted to the complementary colorconversion layer 18, then a color conversion material of thecomplementary color conversion layer 18 is excited by the blue light andthen emits light having the first color, and then the light having thefirst color is mixed with the background blue light to form white light.When the white light is transmitted to the red color resist 9corresponding to the first sub-pixel 12, the red color resist 9 allowslight in the red wave band of the white light to be emitted out, so thatlight finally emitted via the red color resist 9 is red light. For thesecond sub-pixel 13, blue light emitted by the second light-emittingelement 16 is transmitted to the complementary color conversion layer18, then the color conversion material of the complementary colorconversion layer 18 is excited by the blue light and then emits lighthaving the first color, and then the light having the first color ismixed with the background blue light to form white light. When the whitelight is transmitted to the green color resist 10 corresponding to thesecond sub-pixel 13, the green color resist 10 allows light in the greenwave band of the white light to be emitted out, so that the lightfinally emitted via the green color resist 10 is green light. For thethird sub-pixel 14, blue light emitted by the third light-emittingelement 17 is transmitted to the first organic layer 19 and then isemitted out via the white color resist, and the blue light does notundergo a color conversion, so that light finally emitted via the whitecolor resist 20 is still a blue light.

With the above configuration, the light emitted by the firstlight-emitting element 15 undergoes a conversion from blue light intowhite light by using the complementary color conversion layer 18, andthen the light undergoes a conversion from a white light into a redlight by using the red color resist 9; the light emitted by the secondlight-emitting element 16 undergoes a conversion from blue light intowhite light by using the complementary color conversion layer 18, andthen the light undergoes a conversion from a white light into a redlight by using the green color resist 10; and the light emitted by thethird light-emitting element 17 does not undergo a color conversationwhen the light is emitted via the first organic layer 19 and the whitecolor resist 20, so that the light finally emitted out is still bluelight. Since the blue light emitted by the third light-emitting element17 does not undergo a color conversion, a deviation in color puritycaused by incomplete conversion can be avoided, thereby improving colorpurity of the blue light finally emitted out.

In an embodiment, if blue light does not undergo a color conversion, theorganic color conversion layer 7 can be only provided with thecomplementary color conversion layer 18 and is not provided with thefirst organic layer 19, and the color filter layer 8 can be providedwith only the red color resist 9 and the green color resist 10 and isnot provided with the white color resist 20. However, with theconfiguration shown in FIG. 3 , the organic color conversion layer 7 isprovides with the first organic layer 19 and the color filter layer 8 isprovides with the white color resist 20, so that the first organic layer19 can be used to improve flatness of a layer where the organic colorconversion layer 7 is located and the white color resist 20 can be usedto improve flatness of a layer where the color filter layer 8 islocated. Moreover, providing the first organic layer 19 in the organiccolor conversion layer 7 can also improve flexibility of the organiccolor conversion layer 7. When a crack is generated in the inorganicencapsulation layer 5, the first organic layer 19 can prevent the crackin the inorganic encapsulation layer 5 from spreading, thereby improvingthe encapsulation reliability of the thin film encapsulation layer 4.

FIG. 4 is still another cross-sectional view along A1-A2 shown in FIG. 1. In an embodiment, as shown in FIG. 4 , the color conversion layerincludes a red conversion layer 21, a green conversion layer 22, and asecond organic layer 23. The red conversion layer 21 is configured toconvert blue light into red light, and the green conversion layer 22 isconfigured to convert blue light into green light. The second organiclayer 23, which is made of an organic material, is only configured toimprove flexibility and incapable of converting color. The color filterlayer 8 includes a red color resist 9, a green color resist 10, and awhite color resist 20. In the direction perpendicular to the plane ofthe substrate, the red color resist 9 overlaps the red conversion layer21, the green color resist 10 overlaps the green conversion layer 22,and the white color resist 20 overlaps the second organic layer 23.

With reference to FIG. 1 and FIG. 4 , in an example, the sub-pixels 2include a first sub-pixel 12, a second sub-pixel 13, and a thirdsub-pixel 14, the first sub-pixel 12 includes a first light-emittingelement 15, the second sub-pixel 13 includes a second light-emittingelement 16, and the third sub-pixel 14 includes a third light-emittingelement 17. For the first sub-pixel 12, blue light emitted by the firstlight-emitting element 15 is transmitted to the red conversion layer 21,is converted into red light by the red conversion layer 21, then isemitted via the red color resist 9. For the second sub-pixel 13, bluelight emitted by the second light-emitting element 16 is transmitted tothe green conversion layer 22, is converted into green light by thegreen conversion layer 22, then is emitted via the green color resist10. For the third sub-pixel 14, blue light emitted by the thirdlight-emitting element 17 is transmitted to the second organic layer 23and emitted via the white color resist 20. Since the blue light does notundergo a color conversion, the light emitted via the white color resist20 is still blue light.

With the illustrated configuration, the red conversion layer 21 and thegreen conversion layer 22 can directly convert the blue light emitted bythe first light-emitting element 15 into red light and green light,respectively, and it is no longer necessary to convert it into whitelight, thereby improving the color purity of red light and green lightfinally emitted out. For the third sub-pixel 14, the blue light emittedby the third light-emitting element 17 does not undergo a colorconversion when being emitted via the second organic layer 23 and thewhite color resist 20, so that a deviation in color purity caused byincomplete conversion can be avoided, thereby improving color purity ofthe blue light finally emitted out.

In an embodiment, if blue light does not undergo the color conversion,the organic color conversion layer 7 can be provided with only the redconversion layer 21 and the green conversion layer 22 and is notprovided with the second organic layer 23, and the color filter layer 8can be provided with only the red color resist 9 and the green colorresist 10 and is not provided with the white color resist 20. However,with the configuration shown in FIG. 4 , by providing the second organiclayer 23 in the organic color conversion layer 7 and providing the whitecolor resist 20 in the color filter layer 8, the second organic layer 23can be used to improve flatness of the layer where the organic colorconversion layer 7 is located, and the white color resist 20 can be usedto improve flatness of the layer where the color filter layer 8 islocated. Moreover, providing the second organic layer 23 in the organiccolor conversion layer 7 can also improve flexibility of the organiccolor conversion layer 7. When the cracks are generated in the inorganicencapsulation layer 5, the second organic layer 23 can prevent thecracks in the inorganic encapsulation layer 5 from spreading, therebyimproving the encapsulation reliability of the thin film encapsulationlayer 4.

FIG. 5 is a schematic diagram of a red conversion layer and a greenconversion layer according to an embodiment of the present disclosure.In an embodiment, as shown in FIG. 5 , the red conversion layer 21 andthe green conversion layer 22 have different color conversionefficiencies and different areas. In an embodiment, the red conversionlayer 21 has a color conversion efficiency greater than the colorconversion efficiency of the green conversion layer 22 while the redconversion layer 21 has an area is smaller than the area of the greenconversion layer 22. In an embodiment, the red conversion layer 21 has acolor conversion efficiency smaller than the color conversion efficiencyof the green conversion layer 22 while the red conversion layer 21 hasan area larger than the area of the green conversion layer 22. Accordingto the color conversion efficiencies of the red conversion layer 21 andthe green conversion layer 22, areas thereof can be adjusted such that acolor conversion layer having a smaller color conversion efficiency hasa larger area. In this way, the enlarged layer can increase a degree ofconversion of blue light, so that the red conversion layer 21 and thegreen conversion layer 22 tend to have a same degree of conversion ofblue light, thereby improving uniformity of the degree of conversion ofblue light by the red conversion layer 21 and the degree of conversionof blue light by the green conversion layer 22.

FIG. 6 is another schematic diagram of a red conversion layer and agreen conversion layer according to an embodiment of the presentdisclosure. In an embodiment, as shown in FIG. 6 , the red conversionlayer 21 and the green conversion layer 22 have different colorconversion efficiencies, and the red conversion layer 21 and the greenconversion layer 22 have different thicknesses in the directionperpendicular to the plane of the substrate 1. In an embodiment, the redconversion layer 21 has a color conversion efficiency greater than thecolor conversion efficiency of the green conversion layer 22, while thered conversion layer 21 has a thickness smaller than the thickness ofthe green conversion layer 22. In an embodiment, the red conversionlayer 21 has a color conversion efficiency smaller than the colorconversion efficiency of the green conversion layer 22, while the redconversion layer 21 has a thickness greater than the thickness of thegreen conversion layer 22. According to the color conversionefficiencies of the red conversion layer 21 and the green conversionlayer 22, the thicknesses thereof can be adjusted such that the colorconversion layer having a smaller color conversion efficiency has alarger thickness. In this way, the thickened layer can increase a degreeof conversion of blue light, so that the red conversion layer 21 and thegreen conversion layer 22 tend to have a same degree of conversion ofblue light, thereby improving uniformity of the conversion of blue lightby the red conversion layer 21 and the conversion of blue light by thegreen conversion layer 22.

FIG. 7 is another schematic diagram of a red conversion layer and agreen conversion layer according to an embodiment of the presentdisclosure. In an embodiment, as shown in FIG. 7 , a first colorconversion layer 24 includes at least two color conversion sub-layers 25arranged in different layers. If the color conversion efficiency of thered conversion layer 21 is greater than the color conversion efficiencyof the green conversion layer 22, as shown in FIG. 7 , the first colorconversion layer 24 is the green conversion layer 22. If the colorconversion efficiency of the red conversion layer 21 is smaller than thecolor conversion efficiency of the green conversion layer 22, the firstcolor conversion layer 24 is the red conversion layer 21.

In an example in which the color conversion efficiency of the redconversion layer 21 is larger than the color conversion efficiency ofthe green conversion layer 22, since the color conversion efficiency ofthe green conversion layer 22 is smaller than that of the red conversionlayer 21, if the green conversion layer 22 is set as a single layer, itcannot be ensured that all blue light can be performed with the colorconversion, thereby resulting in a color cast of light finally emittedout. In above embodiment of the present disclosure, by setting at leasttwo green color conversion sub-layers 25, the color conversionsub-layers 25 can be used to perform multiple color conversions of bluelight. In this way, color conversion of all blue light can be completed,thereby avoiding the color cast caused by incomplete color conversion ofblue light.

With further reference to FIG. 7 , in order to make a distance betweenthe color conversion sub-layers 25 be relatively small to improve aconversion efficiency of blue light to a greater extent, a distancebetween two closest color conversion sub-layers 25 is L1, where L1≤5 μm.

With further reference to FIG. 2 , the distance between the organiccolor conversion layer 7 and the light-emitting element 3 is L2, and thedistance between the organic color conversion layer 7 and the colorfilter layer 8 is L3, where L2≤5 μm and L3≤5 μm. By setting a minimumvalue of the distance L2 between the organic color conversion layer 7and the light-emitting element 3 to be 5 μm and setting a minimum valueof the distance L3 between the organic color conversion layer 7 and thecolor filter layer 8 to be 5 μm, a distance between the color filterlayer 8 and the light-emitting element 3 is small, thereby reducing atransmission distance of oblique light emitted from the light-emittingelement 3 to the color filter layer 8 and thus reducing a probabilitythat the oblique light is transmitted to the adjacent color resist.

In an embodiment, the organic color conversion layer 7 is formed bycoating with an organic phosphor material. Since the organic phosphormaterial itself can simultaneously achieve encapsulation and colorconversion, directly coating an entire surface with the organic phosphormaterial to form the organic color conversion layer 7 can ensure thatthe organic phosphor material uniformly distributes, thereby improvingan uniformity of a degree of color conversion of light in each area ofthe organic color conversion layer 7.

FIG. 8 is a schematic diagram of an organic color conversion layeraccording to an embodiment of the present disclosure. In an embodiment,as shown in FIG. 8 , the organic color conversion layer 7 is formed bycoating with an organic material 27 doped with color conversionparticles 26. The organic color conversion layer 7 is formed by dopingthe color conversion particles 26 into the organic material 27, whichensures the organic material 27 can be selected within a wide rangeunder a premise that the organic color conversion layer 7 has a functionof converting color. For example, organic material 27, such as acrylicor epoxy resin that have a strong adhesion to inorganic material can beused for coating, thereby improving the encapsulation reliability ofthin film encapsulation layer 4. In a process of manufacturing theorganic color conversion layer 7, after a certain proportion of colorconversion particles 26 are added into the organic material 27,sufficiently stirring can be performed, thereby improving uniformity ofdistribution of the color conversion particles 26 in the organic colorconversion layer 7, and thus improving uniformity of a degree of colorconversion of light in each area of the organic color conversion layer7.

FIG. 9 is another schematic diagram of a display panel according to anembodiment of the present disclosure. In an embodiment, as shown in FIG.9 , at least one inorganic encapsulation layer 5 is an inorganic colorconversion layer 28. The inorganic color conversion layer 28 isconfigured to convert color of light emitted by the light-emittingelement 3. At least one inorganic encapsulation layer 5 is also reusedas the inorganic color conversion layer 28, so that the thin filmencapsulation layer 4 includes at least two color conversion layers (oneorganic color conversion layer 7 and one inorganic color conversionlayer 28) that perform color conversion on light emitted by thelight-emitting element 3, thereby improving a conversion efficiency oflight.

In an embodiment, with further reference to FIG. 9 , the inorganic colorconversion layer 28 is formed by coating with an inorganic material 29doped with color conversion particles 26. The organic color conversionlayer 28 is formed by doping the color conversion particles 26 into theinorganic material 29, so that the organic color conversion layer 28have both the encapsulation function and the color conversion functiondue to the water and oxygen blocking performance of the inorganicmaterial 29 and the color conversion of the color conversion particles26. Moreover, with the configuration, the inorganic material 29 can beselected within a relatively wide range. In an embodiment, the inorganicmaterial 29 having a high adhesion to the organic materials can beselected, so as to improve the encapsulation of the thin filmencapsulation layer 4.

In an embodiment, the organic color conversion layer 28 can be formed bycoating with an inorganic color conversion material, thereby achievinguniform coating of the inorganic color conversion material and improvinguniformity of a degree of color conversion of light in each area of theinorganic color conversion layer 28.

In an embodiment, of the present disclosure, the light-emitting element3 can be an organic light-emitting diode, a light-emitting diode, or alight source emitting light in ultraviolet wave band. When thelight-emitting element 3 is any one of the light sources describedabove, the light emitted by the light-emitting element 3 can beconverted into colorama via the organic color conversion layer 7 and thecolor filter layer 8, thereby achieving a colorful display of thedisplay panel.

FIG. 10 is a schematic diagram of a concave reflective layer accordingto an embodiment of the present disclosure. In an embodiment, as shownin FIG. 10 , the display panel further includes a concave reflectivelayer 30, and the concave reflective layer 30 is configured to reflectthe oblique light emitted by the light-emitting element 3. Since thelight emitted by the light-emitting element 3 is divergent, the lightemitted by the light-emitting element 3 that is transmitted in anon-front visual angle direction is reflected by the concave reflectivelayer 30. As a result, the reflected light is emitted toward a frontvisual angle direction, thereby increasing a light emission rate at thefront visual angle and improving a luminous efficiency.

In an embodiment, with further reference to FIG. 10 , the light-emittingelement 3 is the organic light-emitting diode, the light-emittingelement 3 includes an anode 31, a light-emitting layer 32, and a cathode33, the concave reflective layer 30 is located between the anode 31 andthe cathode 33, and the light-emitting layer 32 is located in thereflective layer 30. In this case, the light emitted from thelight-emitting layer 32 in the non-front visual angle direction isreflected by the concave reflective layer 30, so that the light isemitted toward the front visual angle, thereby increasing the lightemission rate at the front visual angle. In an embodiment, in order toensure that the light-emitting layer 32 emits light under a drivingvoltage received by the anode 31, the concave reflective layer 30 canhave an electrical conductivity, and a hole injection layer and a holetransport layer can be provided between the light-emitting layer 32 andthe concave reflective layer 30.

FIG. 11 is a schematic diagram of a light shielding layer according toan embodiment of the present disclosure. In an embodiment, as shown inFIG. 11 , a light shielding layer 34 can be provided between twoadjacent color resists of color filter layer 8 (such as between the redcolor resist 9 and the green color resist 10, between the green colorresist 10 and the blue color resist 11, or between the blue color resist11 and the red color resist 9). The light shielding layer 34 shields theoblique light emitted by the light-emitting element 3, therebypreventing the light emitted by the light-emitting element 3 from beingemitted via the adjacent color resist, and thus ameliorating the colorcast to a greater extent.

An embodiment of the present disclosure further provides a displaydevice. FIG. 12 is a schematic diagram of a display device according toan embodiment of the present disclosure. As shown in FIG. 12 , thedisplay device includes the display panel 100 described above. Astructure of the display panel 100 has been described in detail in theabove embodiments and is not repeated herein. The display device shownin FIG. 12 is merely illustrated as an example, and the display devicecan be any electronic device having a display function, such as a mobilephone, a tablet computer, a notebook computer, an electronic paper book,or a television.

The display device provided by the embodiments of the present disclosureincludes the display panel 100 described above. Therefore, with thedisplay device, by reusing at least one organic encapsulation layer 6 inthe thin film encapsulation layer 4 as the organic color conversionlayer 7, the organic color conversion layer 7 can be arranged in thethin film encapsulation layer 4. In this case, the organic colorconversion layer 7 and the organic encapsulation layer 6 that is reusedas the organic color conversion layer 7 only occupy one layer space,thereby reducing the overall thickness of the display device, which ismore conducive to achieving thinning and lightening design of thedisplay device. Moreover, a distance between the color filter layer 8and the light-emitting element 3 is also reduced accordingly, and thusthe transmission distance of oblique light emitted from thelight-emitting element 3 to the color filter layer 8 is reducedaccordingly, thereby reducing a probability that the oblique light istransmitted to the color resist corresponding to an adjacentlight-emitting element 3. In this way, the color cast is ameliorated.

The above-described embodiments are merely exemplary embodiments of thepresent disclosure and are not intended to limit the present disclosure.Any modifications, equivalent substitutions and improvements made withinthe principle of the present disclosure shall fall into the protectionscope of the present disclosure.

Finally, it should be noted that, the above-described embodiments aremerely for illustrating the present disclosure but not intended toprovide any limitation. Although the present disclosure has beendescribed in detail with reference to the above-described embodiments,it should be understood by those skilled in the art that it is stillpossible to modify the technical solutions described in the aboveembodiments or to equivalently replace some or all of the technicalfeatures therein, but these modifications or replacements do not causethe essence of corresponding technical solutions to depart from thescope of the present disclosure.

What is claimed is:
 1. A display panel, comprising: a substrate; aplurality of sub-pixels each comprising a light-emitting element; a thinfilm encapsulation layer located at a side of the light-emitting elementfacing away from the substrate and comprising a plurality of inorganicencapsulation layers and at least one organic encapsulation layer thatis located between the plurality of inorganic encapsulation layers, theat least one organic encapsulation layer being an organic colorconversion layer configured to convert a color of light emitted by thelight-emitting element; and a color filter layer located at a side ofthe thin film encapsulation layer facing away from the substrate,wherein the light-emitting element of each of the plurality ofsub-pixels is a blue light light-emitting element; wherein the organiccolor conversion layer comprises a red conversion layer, a greenconversion layer and a second organic layer, the red conversion layer isconfigured to convert blue light into red light, and the greenconversion layer is configured to convert blue light into green light;and wherein the color filter layer comprises a red color resist, a greencolor resist, and a white color resist, wherein in a directionperpendicular to a plane of the substrate, the red color resist overlapsthe red conversion layer, the green color resist overlaps the greenconversion layer, and the white color resist overlaps the second organiclayer.
 2. The display panel according to claim 1, wherein the redconversion layer and the green conversion layer have different colorconversion efficiencies and different areas.
 3. The display panelaccording to claim 1, wherein a color conversion efficiency of the redconversion layer is different from a color conversion efficiency of thegreen conversion layer, and the red conversion layer and the greenconversion layer have different thicknesses in the directionperpendicular to the plane of the substrate.
 4. The display panelaccording to claim 3, wherein the color conversion efficiency of the redconversion layer is greater than the color conversion efficiency of thegreen conversion layer, and wherein the green conversion layer comprisesat least two color conversion sub-layers arranged in different layers;or wherein the color conversion efficiency of the red conversion layeris smaller than the color conversion efficiency of the green conversionlayer, and wherein the red conversion layer comprises at least two colorconversion sub-layers arranged in different layers.
 5. The display panelaccording to claim 4, wherein a distance between two closest colorconversion sub-layers of the at least two color conversion sub-layers isL1, where L1≤5 μm.
 6. The display panel according to claim 1, wherein adistance between the organic color conversion layer and thelight-emitting element is L2, where L2≤−5 μm; and wherein a distancebetween the organic color conversion layer and the color filter layer isL3, where L3≤5 μm.
 7. The display panel according to claim 1, whereinthe organic color conversion layer is formed by coating with an organicphosphor material.
 8. The display panel according to claim 1, whereinthe light-emitting element is a light-emitting diode, wherein thelight-emitting diode comprises an organic light-emitting diode.